Tobacco-pipe



Nov 29, 1932. KL|NGEN$T|ERNA 1,889,073

TOBACCO PIPE Filed Feb. 5, 1931 Patented Nov. 29 1932 PATENT OFFICE AXEL KLINGENS'IIERNA, OF KARLSTAD, SWEDEN TOBACCO-PIPE Application filed February 5, 1931, Serial No. 513,700, and in Sweden February 12, 193( In smoking tobacco in the usual pipes the tobacco at the bottom of the pipe-bowl will as well known, become considerably sooty and get a higher percentage of nicotine and other constituents, because the smoke from the tobacco in the upper portion of the pipebowl has to pass through this bottom layer of tobacco, said bottom layer consequently is unpleasant and injurious to smoke, the more as it will absorb some of the tarry oil accumulating at the bottom of the bowl. This tarry oil also generally flows into the pipestem.

To avoid these inconveniences a great number of insertings have been designed to be inserted into the pipe-bowl permanently or temporarily, but none of those insertings has been satisfactory. On the contrary, they have rather caused the smoker further inconveniences.

A close study of the problem showed that such an insertion or inset for tobacco-pipes should fulfill the following requirements:

1. At the combustion of the upper layers of tobacco in the bowl the stroke shall not pass through the tobacco at the bottom but shall substantially be conducted laterally of said bottom layer down into a chamber in the bowl below the insertion and from there into the pipe-stem.

2. At the combustion of the bottom layer of tobacco in the bowl the smoke is to be conducted through the bottom of the insertion down into said chamber below the insertion,

' the tarry oil being accumulated in said chamber out of contact with the tobacco, which is consequently not soiled with the injurious oil. Simultaneously a suitable quantity of usual cold air (free from smoke) having the same temperature as the atmosphere is to be introduced into said chamber, laterally of the bottom of the insertion and the burning tobacco thereon, to be mixed with the smoke in said chamber and then be sucked into the pipe-stem. This additional air reduces the temperature of the bowl at the smoking of the tobacco at the bottom of the bowl. Heretofore the smoking of the bottom layer of tobacco was made at a higher temperature than that prevailing at the smoking of the upper layers of tobacco.

In addition to these general requirements a great adjustability of the draught openings in the bottom of the insertion both absolutely and in relation to the other draught openings in the insertion must he demanded, because it was found that the combustion of the tobacco and the flavor or taste of the smoke and the possibility of obtaining an ash of a suitable composition, which depend upon said combustion, are very sensible particularly to the manner, in which the air is supplied and the smoke drawn oil and which must be chosen with regard to the size and shape of the bowl, the qualities of the tobacco, etc., it the result desired is to be attained.

To fulfill these requirements the pipe inset or insertion is in a well-known manner provided in its bottom with a number of holes to form a grate on which the bottom layer of tobacco is burnt or combusted, said insertion being placed in such manner in the pipe-bowl, that a chamber is formed below the bottom of the insertion. In accordance with the invention flaps are punched in the bottom of the insertion to form adjustable bottom holes and the insertion is in addition provided with a number of draught holes for air and smoke above said bottom, said draught holes communicating directly with said chamber below the bottom of the insertion, and further the insertion is to its principal part placed in the lower half of the bowl and provided with an edge, tightly fitting to the inner wall of the bowl at or below the middle of the depth thereof, so that the air and smoke may flow to said chamber below the bottom of the insertion through said bottom holes and said special draught holes only.

In one preferred embodiment of the inventionthe bottom (grate) of the pipe insertion consists of a number of teeth or flaps bent upwards and so arranged that the, size of the opening for the admission of air may be ad justed in any manner desired by bending one of said flaps up or down.

Two embodiments of the invention are shown in the annexed drawing.

Fig. 1 shows a development. in a plane of CPI a pipe insertion easy to insert and remove by means of arms or hooks, extending round the upper edge of the pipe-bowl.

Fig. 2 shows a side view of the same insertion, after it has been bent, ready for being inserted into the bowl.

Fig. 3 shows a cross-section through a pipebowl withan insertion as shown in Figs. 1 and 2, to illustrate more particularly the directions of the air currents during the combustion of the upper layers of tobacco.

Figs. 4-8 show another embodiment, lit for being placed more permanently in the pipebowl.

Fig. 4c is a development of the insertion in a plan.

Fig. 5 is a plan view and Fig. 6 a side View of the insertion, when bent and ready for beingplaced in the bowl.

Fig. 7 is a cross-section illustrating the directions of the air-currents dur ng the combustion of the upper layers of tobacco Fig. 8 is a cross-section illustrating the directions of the air-currents during the combustion of the layer of tobacco at the bottom.

Referring now to the drawing, the pipe insertion shown in Figs. 1-3 is made of a single piece of sheet metal, by preference thin steel sheet well annealed, and has substantially the shape of a sector of a ring, when developed in a plan(Fig. 1), three arms 2, 3 and 1 projecting radially from said sector. At the inner periphery of the sector 1 a number of flaps or teeth 5 are punched, of which one 6 is somewhat longer than the other, and holes 7 ,8 are cut out at different heights in the sector 1. As illustrated in Figs; 2 and 3. the insertion is bent to a truncated cone, which is out along a generatrix, at which the adjacent edges overlap each other. Notches 9, 10 and 11 are cut at the outer periphery of the sector 1 at the lower ends of the arms 2, 3 and 4 and a flange 12 is bent out along said outer periphery of the sector 1 to keep tight against the inner wall of the bowl 13, when the insertion is inserted therein, as shown in Fig. 3. The notches 9, 10 and 11 then form draught holes in the tight flange 12. The insertion is pushed down to such a depth in the bowl 13, that a chamber 14- is formed below the bottom 5 of the insertion and then the arms 3 and 4: are bent roundthe upper edge of the bowl to keep the insertion at the correct level in the bowl. The flange 12 fitting tight also keeps the side walls of the cone 1 away from the inner side walls of the bowl to keep the holes 7, 8, 9, 10 and 11 free and in direct communication with the chamber 1 1, so that smoke and air may be sucked into said chamber through the holes 7 8, 9, 10, 11 and through the bottom hole at 6 and from this chamber into the smoke channel 15 in the pipe stem. Itis to be observed that the insertion may be accommodated to bowls of different depths and diameters, in as much as the cone 1 is out along a generatrix and has overlapping edges, so that its diameter may be reduced within wide limits by pressing the arms 2 and 4t tog-ether. When the insertion is pushed into the bowl, the arms 2 and 4 are pressed tightly together to make the diameter of the insertion small. After the insertion has been placed in the bowl, the cone 1 springs out and presses the arms 2 and 4 apart while increasing the diameter of the insertion so much that the flange 12 fits tight to the inner wall of the bowl. By bending the upper portions of the arms 2, 3 and 1 in a suitable manner the insertion may be adjusted to bowls of difierent depths, said insertion being always placed in such manner that the cone 1 is in the lower portion of the bowl. The action of the insertion is explained in detail below.

The inset shown in Figs. l8 is fit for be ing placed more permanently in the pipebowl and is punched from sheet metal in one integral piece. When developed in a plane the inset consists of a circular central portion 16 having three projecting arms or springs 17, each provided with a notch 18 in its side edge. In the central plate 16 a number of holes 19 are made. The arms 17 are bent up substantially at right angles to the bottom 16 and are simultaneously bent to a concave shape (seen from the outside) in order to form channels 20 (Figs. 7 and 8) between themselves and the inner wall of the bowl 13, when the insertion is pressed down into the bowl. The insertion shall be so dimensioned that the disk or bottom 16 will abut against and fit tight to the inner wall of the bowl and a chamber 14. is at hand below said bottom 16, in the same way as in the case illustrated in Fig. 3. The insertion 16 is kept in its place by the springy arms 17 abutting against the inner wall of the bowl 13. Air and smoke cannot flow down into the chamber 1% around the periphery of the disk 16 but substantially only through the channels 20.

The devices described act as follows:

VJ hen the upper layers of tobacco in the pipe-bowl are smoked, the smoke is substantially drawn through the lateral openings 9, 10 and 11 (and also 7 and 8) in 3 or 20 in Fig. 7 and consequently the smoke does not pass through the tobacco at the bottom of the insertion. The bottom layer of tobacco, therefore, does not become sooty nor soiled with nicotine or oil. From the openings 9, 10 and 11 or the channels 20 the smoke is sucked down into the chamber 1 1 and therefrom into the channel 15 in the pipe stem. The arrows in Figs. 3 and 7 indicate the directions of flow. It is to be observed if the upper openings of the channels 20 are obstructed by the tobacco in the bowl, the smoke will flow through the notches, 18

into said channels 20. Thus, there is no risk for the channels being obstructed.

hen the upper layer of tobacco in the bowl has been consumed and the smoking of the tobacco in the insertion proper begins, the openings 9, 10 and 11 or the upper orifices of the channels 20 8) are set free and cold -ir is sucked in through said openings while the smoke simultaneously is sucked down through the holes in the bottom of the insertion, i. e. through the hole formed by the flap 6 (and to some extent also between the flaps 5) or the holes 19. The cold air and the smoke are mixed in the chamber 14 and thus the smoke is cooled and simultaneously said cold air directly cools the insertion. In the pauses between-the putts, the smoke escapes through the holes 9, 10 and 11 and a further quantity of cold air enters the holes 7 and 8 to cool the insertion still more. The strong heating at the smoking of the bottom layer of tobacco in usual pipes and in pipes having insertions of designs heretofore pro posed as Well as the injurious actions of said heating are, thus, substantially eliminated by use of the insertion in accordance with my invention. It is a matter of fact that an insertion according to the invention keeps the pipe much cooler than usual without influencing upon the flavour of the smoke, and gives an ash and a remainder of a suitable composition. Furthermore, the injurious physiologic actions upon the mucous membranes of the throat and the eyes is eliminated to the greatest part and the smoke will not bite the tongue.

The smoke may be still more purified by placing some tobacco in the chamber 14 below the insertion to absorb injurious constituents ot the smoke. The chamber 1d shall, as a rule, have a height of about 0.5 cm. If the bottom of the insertion should for any reason be placed too hight in the bowl, some tobacco should also be placed in said chamber 1 1- to eliminate the inconveniences caused by the fact that the chamber 14: is too great.

its stated above, the smoker himself can easily adjust the draught openings of the insertion after the shape and size of the bowl, the qualities of the tobacco, personal taste etc. The size of the bottom hole in the embodiment shown in Figs. 13 may easily be adjusted by bending the flap 6 up or down, to any value desired, both absolutely and in relation to the sizes of the holes 9, 10, 11. Also the holes 7, 8, 9, 10, 11, 19 may be formed by punching flaps adhering at one edge to the insertion. The size of said holes may then be adjusted by bending those flaps more or less.

Some modifications may be made in the devices described without exceeding the scope of the invention. Thus, the arms 2, 3 and 4 in the embodiment shown in Figs. 13 may be bent to the same shape as the arms 17 in Figs. h 8 to form air channels and said arms 17 in Figs. i8 may be extended to be bent round the upper edge of the bowl. The number and sizes of the various openings may vary in accordance with the individual demands. Some of the flaps 5 may be cut off at their tops, it it is desired to increase the bottom holes.

The insertionmay be made of clay or other material entirely or partially.

hat I claim is:

1. In an insertion adapted to be inserted into the bowl of tobacco pipes, a bottom, flaps punched in said bottom toi'orm adjustable holes, arms for kee 'iing insertion to its principal part in the lower hall of said bowl and for keeping simultaneously said bottom at a certain level in said bowl to form a chamber below said bottom, in said insertion at a distance above said bottom two or more draught holes for smoke and air communicating directly with said chamber below said bottom, and an edge on said insertion to lit tight to the inner side wall of said bowl at or below the middle or" the depth of said bowl to permit the air and the smoke to flow down into said chamber through said bottom holes and said draughtholes only.

2. In an insertion adapted to be inserted into the bowl of tobacco pipes, a truncated cone, whose mantle is cut along a generatrix and has overlapping edges, on said cone a number of flaps bent inwards to form a bot-- tom having adjustable holes, arms extending upwards from said cone round the upper edge of said bowl to keep said cone in the lowerhalf of said bowl and to keep said bottom simultaneously at a certain level in said bowl so as to form a chamber below said bottom, in the side walls of said cone at a distance above said bottom two or more draught holes for smoke and air communicating directly with said chamber below said bottom, and a flange on the upper edge of said cone springing out to fit tight to the inner side wall of said bowl at or belowthe middle of the depth of said bowl to permit the air and the smoke to flow down into said chamber substantially through said bottom holes and said side draught holes only.

3. In an insertion adapted to be inserted into the bowl of tobacco pipes, a truncated cone, whose mantle is out along a generatrix and has overlapping edges, on said cone a number of flaps bent inwards to form a bottom having adjustable holes, arms extending upwards from said cone round the upper edge of said bowl to keep said cone in the lower half of said bowl and to keep said bottom simultaneously at a certain level in said bowl so as to form a chamber below said bottom, in the side walls of said cone at a distance above said bottom two or more draught holes for smoke and air, a flange on the upper edge of said cone, and additional draught holes for smoke and air in said flange, all of said draught holes communicating directly with said chamber below said bottom, and said cone springing out to press said flange tightly against the inner side wall of said bowl at or below the middle of the depth of said bowl to permit the air and the smoke to flow down into said chamber and therefrom into the pipe-stem substantially through said bottom holes and said side draught holes only.

4. In an insertion adapted to be inserted into the bowl of tobacco pipes, a truncated cone, whose mantle is out along a generatrix and has overlapping edges, on said cone a number of flaps bent inwards to form a bottom having adjustable holes, arms extending upwards from said cone round the upper edge of said bowl to keep said cone in the lower half of said bowl and to keep said bottom simultaneously at a certain level in said bowl so as to form a chamber below said bottom, in the side walls of said cone at a distance above said bottom two or more draught holes for smoke and air, in said arms bent to concave shape channels for air and smoke, all of said lateral draught openings and said channels communicating directly with said chamber below said bottom, and a flange on said cone between said arms, said cone springing out to press said flange tightly against the inner side wall of said bowl at or below the middle of the depth of said bowl to permit the air and smoke to flow down into said chamber and therefrom into the pipe-stem substantially through said bottom holes, said lateral holes and said channels only.

5. In an insertion adapted to be inserted into the bowl of tobacco pipes, a truncated cone, whose mantle is out along a generatrix and has overlapping edges, on said cone a number of flaps bent inwards to form a bottom having adjustable holes, arms extending upwards from said cone round the upper edge of said bowl to keep said cone in the lower half of said bowl and to keep said bottom simultaneously at a certain level in said bowl so as to form a chamber below said bottom, a flange on the upper edge of said cone springing out to lit tight to the inner side wall of said bowl at or below the middle of the depth of said bowl, flaps cut in said flange to form additional adjustable draught holes for smoke and air communicating directly with said chamber below said bottom to permit the air and the smoke to flow down into said chamber through said bottom holes and said additional draught holes only.

6. In an insertion adapted to be inserted into the bowl of a tobacco pipe, a truncated cone, whose mantle is out along ageneratrix and has overlapping edges, on said cone a number of flaps bent inwards to form a bot tom having adjustable holes, arms extending upwards from said cone round the upper edge of said bowl to keep said cone substantially in the lower half of said bowl and to keep said bottom simultaneously at a certain level in said bowl so as to form a chamber below said bottom, in the side walls of said cone at a distance above said bottom a plurality of draught holes for smoke and air, a flange on the upper edge of said cone springing out to fit tight to the inner side wall of said bowl at or below the middle of the depth of said bowl, and flaps cut in said flange to form additional adjustable draught holes for smoke and air, all of said draught holes communicating directly with said chamber below saidbottom to permit the air and the smoke to flow down into said chamber through said bottom holes and said draught holes only.

In testimony whereof I have signed my name.

AXEL KLINGENSTIERNA. 

